Logistics management involves planning and controlling the efficient flow of goods and services. Inventory management balances supply and demand through various types of inventory like safety stock. Warehousing provides storage and preservation of goods between production and consumption. It allows for inspection, packaging and processing of goods. Logistics information systems deliver the right information to the right people at the right time through input, databases, and outputs. Order processing fulfills customer orders accurately from order acceptance through delivery. The bullwhip effect causes demand swings to amplify up the supply chain.